20. check sr-iov¶
sr-iov主要由网卡进行支持。 需要在bios开启sr-iov选项。
支持情况：
| 服务器型号 | 网卡类型 | 是否支持 |
|---|---|---|
| Taishan2280 V1 | 板载网卡 | 不支持 |
| Taishan2280 V1 | 其它网卡 | 不支持 |
| Taishan2280 V2 | 板载网卡 | 支持 |
| Taishan2280 V2 | 其它网卡 | 由网卡决定 |
在Taishan 2280v2上，确认是否支持sr-iov
Huawei BIOS Setup Utility V2.0
Advanced
/--------------------------------------------------------+---------------------\
| PCIe Config | Help Message |
|--------------------------------------------------------+---------------------|
| > CPU 0 PCIE Configuration |Press <Enter> to |
| > CPU 1 PCIE Configuration |config this CPU. |
| Support DPC <Disable> | |
| SRIOV <Enable> | |
| Hilink5 Work Mode <PCIe Mode> | |
| PCIe DSM5# Mode <BIOS Reserve> | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | ||UniqueQuestionId(), QuestionId :0x32FE.
|--------------------------------------------------------+---------------------|
| F1 Help ^v Select Item -/+ Change Value | F9 Setup Defaults |
| Esc Exit <> Select Menu Enter Select>Sub-Menu | F10 Save & Exit |
|etUniqueQuestionId(), QuestionId :0x32FE.
[user1@centos ~]$ ls -la /sys/class/net/
total 0
drwxr-xr-x. 2 root root 0 Dec 12 10:54 .
drwxr-xr-x. 70 root root 0 Dec 12 10:52 ..
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp125s0f0 -> ../../devices/pci0000:7c/0000:7c:00.0/0000:7d:00.0/net/enp125s0f0
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp125s0f1 -> ../../devices/pci0000:7c/0000:7c:00.0/0000:7d:00.1/net/enp125s0f1
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp125s0f2 -> ../../devices/pci0000:7c/0000:7c:00.0/0000:7d:00.2/net/enp125s0f2
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp125s0f3 -> ../../devices/pci0000:7c/0000:7c:00.0/0000:7d:00.3/net/enp125s0f3
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp189s0f0 -> ../../devices/pci0000:bc/0000:bc:00.0/0000:bd:00.0/net/enp189s0f0
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp189s0f1 -> ../../devices/pci0000:bc/0000:bc:00.0/0000:bd:00.1/net/enp189s0f1
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp189s0f2 -> ../../devices/pci0000:bc/0000:bc:00.0/0000:bd:00.2/net/enp189s0f2
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 enp189s0f3 -> ../../devices/pci0000:bc/0000:bc:00.0/0000:bd:00.3/net/enp189s0f3
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 virbr0 -> ../../devices/virtual/net/virbr0
lrwxrwxrwx. 1 root root 0 Dec 12 10:52 virbr0-nic -> ../../devices/virtual/net/virbr0-nic
[user1@centos ~]$ find /sys -name sriov_numvfs 2>/dev/null
/sys/devices/pci0000:74/0000:74:01.0/0000:75:00.0/sriov_numvfs
/sys/devices/pci0000:b4/0000:b4:01.0/0000:b5:00.0/sriov_numvfs
/sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.3/sriov_numvfs
/sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.1/sriov_numvfs
/sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.2/sriov_numvfs
/sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.0/sriov_numvfs
/sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.1/sriov_numvfs
/sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.2/sriov_numvfs
/sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.0/sriov_numvfs
/sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.3/srio
[user1@centos ~]$ sudo echo 1 > /sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.3/sriov_numvfs
-bash: /sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.3/sriov_numvfs: Permission denied
[user1@centos ~]$ su root
Password:
[root@centos user1]# history^C
[root@centos user1]# sudo echo 1 > /sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.1/sriov_numvfs
[root@centos user1]# cat /sys/devices/pci0000:7c/0000:7c:00.0/0000:7d:00.1/sriov_numvfs
1
[root@centos user1]# echo 1 > /sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.3/sriov_numvfs
[root@centos user1]# cat /sys/devices/pci0000:bc/0000:bc:00.0/0000:bd:00.3/sriov_numvfs
1
[root@centos user1]#